Rolling process and rolling stand of steel plate |
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| 申请号 | US42056573 | 申请日 | 1973-11-30 | 公开(公告)号 | US3861188A | 公开(公告)日 | 1975-01-21 |
| 申请人 | NIPPON STEEL CORP; | 发明人 | KAMIT NORIMASA; TERAKADO RYOZI; | ||||
| 摘要 | A process and a rolling mill for rolling thin plate by means of a tandem rolling mill characterized in that the diameter of either of the upper or the lower working rolls in optional rolling stands situated in the rear step of the tandem rolling mill for thin plate consisting of a plurality of rolling stands is chosen smaller than that of other corresponding working rolls and that the rolling work is carried out by driving only the working rolls with larger diameter. | ||||||
| 权利要求 | 1. A process for rolling a thin steel plate by means of a tandem rolling mill having a plurality of rolling stands, each stand having an upper working roll and a lower working roll comprising, reducing the plate through a plurality of front stands having equal-diameter working rolls, reducing the plate through at least one rear stand having working rolls of different diameters, rotating the working rolls of the first stand of said plurality so as to have the largest torque, and rotating the largest of said working rolls of said at least one stand following said first stand so that the torque of said at least one stand is less than half of the torque of said first stand. 2. The process according to claim 1, wherein said step of reducing the plate through at least one stand comprises reducing the plate through two stands having an upper working roll of smaller diameter than the lower working roll. 3. The process according to claim 2, wherein said step of reducing the plate through at least one stand comprises forming grooves on one of said working rolls of said at least one stand corresponding to a pattern for a checkered plate. 4. A tandem rolling mill for rolling thin steel plates comprising, a plurality of front rolling stands having an upper working roll and a lower working roll of equal diameter, at least one rear rolling stand having an upper working roll and a lower working roll, one of said working rolls having a a smaller diameter than the other, means for driving only the large diameter working roll, the first rolling stand of said plurality having working rolls driven so as to have the largest torque of all the stands, and said means for driving said larger diameter working roll driving said roll at less than half the torque of said first rolling stand. 5. The tandem rolling mill according to claim 4, wherein one of said working rolls of said at least one rear rolling stand comprises a grooved roll. 6. The tandem rolling mill according to claim 5, wherein said smaller working roll comprises a grooved roll. 7. The tandem rolling mill according to claim 4, comprising two rear rolling stands. 8. The tandem rolling mill according to claim 7, comprising six rolling stands, said plurality of front rolling stands comprises the first three stands, said two rear rolling stands comprises the fourth and fifth rolling stands, and the sixth rolling stand comprises a rolling stand similar to that of the first rolling stand. 9. The tandem rolling mill according to claim 4, wherein the torque of each stand is progressively lower as the plate travels from the first stand to subsequent stands. |
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